Adjustable end thrust for elevator shafts



` May 19, 1925. 1,538,573

.p. F. MINNEY ADJUSTABLE END THRUST FOR ELEVATOR SHAFTS Filed Dec. 1 1924 ?Sheet's-Sheet 1 I v emmm,

May 19, 1925.

D. F. MINNEY ADJUSTABLE END TI IRUST FOR ELEVATOR SHAFTS Filed Dec. 1 1924& 2 Sheets-Shet 2` nvcuto' .DAVID F. MINNEY.

Patentecl May 19,1925. 3 L i a UNITED STATES ATENr OFFICE.)

DAVID F, MINNEY, OF FORT WORTH, TEXAS, ASSIGNOR TO GLOBE ELEVATOR APPLI- ANCE COMPANY, OF FORT WOBTH, TEXAS, A COR-PORATION OF IDELAWARE.

ADJUSTABLE nun THRUST ron ntnva'roa SHAFTS. Application filed December 1, 1924. Serial I-Io. 7533406.

To all who m it may' camera: which is bolted to the gearcasng 3 by stud '55 I Be it known that I, DAVID F. MINNEY, a bolts 12 by screwing the 'bolts 12 into the citizen of the United States, resding at casing and then. mounting the head 11 there- Fort Worth, 'in the county of Tarrant and on and then securing the same withthe nuts 5 State` of Texas, have invented certain new 3. The driving members include the screw and useful Improvements in Adjustable End shaft 14 and a steel disk 15. The disk 15 is Thrusts for Elevator Shafts, of which the non-revoluble and is prevented from revolvfollowing is a specifieation. ing by studs 16 which project into sockets My invention relates to thrust bearngs 17 in the head 11. A bronze disk 18 is 10 and more particularly to thrust bearings in mounted between the driving disk 15 and j combnation with the brake wh el hafts of the end. of the thrust member 7 to prevent elevators; and the object is to provide simfriction of the steel disk 15 and the end of ple devices for taking up the slack of or the thrustmember 7'. The head or flange 8 wear on the shoulders of the' orm wheel On the thrust member 7 provides additional 15 shafts and also the wear on the teeth of the surface for eXerting pressure, that is, it protlrum and neutral gear wheels. One of the vdes greater surface for the disks 15 and objects is to save time and expense of dis 18 to press against when' driven by the screw mantling the machinery by providing de shaft 14. The space 19 within the head 11 vices by which the wear can be taken up and about the thrust member 7 and flange instantly without disturbing or taking 8 and disks 15 and 18 constitutes a reservoir down the head. Other objects and advanfor a lubricant. The lubricant is prevented tages will be fully explained in the followfrom escaping about the member 7 `by a disk ing description and the invention will be 20 which carries a felt Washer 21. The disk more particularly pointed out in the claims. 20 is held in place bythe gear casing 3 and 25 'Reference is had to the aceompanying the head 11, being caught at its rim between i drawings which form a part of this applicaportions of the head 11 and the gear castion. ing 3.

Fig. 1 is a longitudinal section ofa por- After the screw shaft 14 has been position of the gear casing, showing the worm tioned, it is held in place by a nut 22 and a pinion and portions of the neutral and drum lock wrench 23. The screw shaft 14 is gear wheels. Fig. 2 is a longitudinal seoscrewed in until the shoulder 24 has pressed 8 tion of the spool or thrust member and the the disks 15 and 18 snugly against the head driving head. Fig. 3 is an interior end ele- 8 of the thrust member 7. The wrench lock Nation of the device, as shown in Fig. 2.' 23 is then placed about the screw shaft 14 35 Fig. 4 is an exterior end elevation of the deand Secured by one of the stud screws 12 vice, as shown in Fig. 2. Fig. 5 is an end and its nut 13. When the teeth on the elevation of the bronze bearing disk. 4 drum gear wheel 1 and neutral gear wheel i Similar characters of reference are used 2 and the worm threads 4 on shaft 5 become to indicate the same parts throughout the worn, the mechanism willbegin to hammer several views. and knock and the thrust member 7 will be- The gear ease and the worm gearing are come loose. The trouble will beremedied shown in part in the drawings. The drum by removing the nut 22 and then turning gear 1 and the neutral gear 2 are shown in the screw shaft 14 to drive forward the disk the gear casng 3 together with the worm 15 until the wear is taken up. The nut 22 pinion 4 with its shaft 5. The shaft 5 has is then replaced. The bronze bearing 18 and sockets for dowel pins 6 which are carried the thrust member 7 will be driven inwardly by the thrust member 7. The thrust memto move theshaft 5 to adjust the teeth 4. ber 7 has a head 8 and a socket in the end The bronze bearing 18 is lubricated on for a bronze bushing 9 which is mounted in opposite sides by curved grooves 25. The this socket. The bushing 9 is rigd with lubricant from the reservoir 19 will penethe thrust member 7 and loose on the spintrate the grooves 25 and t-hus keep the beardle or shaft 10 on which the thrust member ing 18 lubricated to prevent friction against j is supported and runs. The end thrust fiX- the disk 15 and the head 8 of the driving y tures are supported generally by a head 11 member 7. The screw shaft 14 has fiatsides 26 to be engaged by the wrench lock 23. The wrench lock 23 can be Secured by any one of the bolts 12.

hat I claim, is,-

1. The combination with an elevator shatt and bearings therefor, of an end thrust 'for adjusting said shaft consisting of a thrust drive member having a head and operatively connected with said sha'ft and provided with a socket therein, a hearing housing operatively connected to the bear-ing of said shat, a non-revoluble steel driving disk operatively connected to said housing and an antit'riction hearing disk interposed between said steel disk and 'said head, a screw driving member Operating through said housing for adjusting said thrust member and provided with a reduced end portion projected into said thrust member and constituting a bearing theretor and having a shoulder bearing against said steel disk, and means for preventing the turning ot' said screw driving member after it has` been positioned.

2. The combination with an elevator sha't and casing therefor of an end thrnst consisting of a thrust drive member having a head and operatively connected with said shaftand provided witha socket therein, a bearing housing rigidly connected to said casing, a bronze hearing in said socket, a driving disk non-revolubb connected to said housing, a bronze bear-ing: disk interposed between said drivng disk and said head, a screw driving member Operating through said housing 'or adjusting said thrust drive member and reduced end portion profected into said bronze bearing, and .means 'or looking said screw driving member against turnng after it is installed.

3. The combination with an elevator shaft and casing therefor of an end thrust consisting of a thrust drive member having a head and operatively connected with said shaft and provided with a socket therein, a bronze hearing in said socket, a berng housing rigidly connected to said casing and provided with a screw-threaded opening therethrough, a steel drivin g disk loosely but non-revolubly connected to said housing` a bronze hearing disk interposed between said steel disk and said head and provided with, lubricating ducts in the faces thereof, said bearing housing constituting a lubricant reservoir, a screw driving member operating through said housing and having a bearing member projected into said bronze bearing, and means for preventing the turning of said screw afterit is installed consisting of a wrench lock Secured to said housing and a lock nut engaging said screw member.

In testimony whereof, I set my hand, this 26th day of November, 1924.

DAVID F. M INNEY provided with a 

